Multiplus II Low Battery and missing Dynamic Cut-Off page in assistant

Q&A and troubleshooting
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1

Hello,

I have a 3 phase ess system with one multiplus II 48/5000 GX and two multiplus II 48/5000, cerbo gx, Pylontech battery. Lately I got a low battery (Multiplus switches to pass-thru) warning on the multiplus but not on the cerbo, SoC is the same as on the cerbo (e.g. 85%). When I cut mains multiplus switches to discharging. When I restart the multiplus everything is working fine again. After some time the issue occurs. Yesterday it did not work, no power, I think it thinks it is completely empty.

I checked cable connections, settings, firmware… everthing fine. But I recognized that the dynamic cut-off page in the ess assistant is missing in the older/without gx multiplus.

Has anybody experienced similar?

Thanks
Sven

2

I restarted the Cerbo now it’s discharging again and the low battery warning is gone.

The missing cut-off page didn’t appear though.

3

Only the master (normally L1) has the cut-off settings in the assistant, that’s normal.

4

I thought so but I didn’t found any documentation, thanks

5

New Update:
After it was below minimum SoC and got load, inverter switched to pass-thru and never came out of it. Only after I rebooted the cerbo then it switched back to discharging. Anything is weird in the cerbo, maybe some issues with the firmware (v3.66).

I replace the cerbo with a new one and will keep you informed.